Thank you for your quickly answers ! So,
as Kevin suggest me, I have reinstalled all packages concerning gstreamer (plugins, libraries, totem), but the problem is still present. For Sebastian these are the outputs for the commands: [EMAIL PROTECTED]:~$ dpkg -L gstreamer0.10-plugins-bad /. /usr /usr/share /usr/share/doc /usr/share/doc/gstreamer0.10-plugins-bad /usr/share/doc/gstreamer0.10-plugins-bad/NEWS.gz /usr/share/doc/gstreamer0.10-plugins-bad/AUTHORS /usr/share/doc/gstreamer0.10-plugins-bad/README.Debian /usr/share/doc/gstreamer0.10-plugins-bad/copyright /usr/share/doc/gstreamer0.10-plugins-bad/README.gz /usr/share/doc/gstreamer0.10-plugins-bad/changelog.Debian.gz /usr/lib /usr/lib/gstreamer-0.10 /usr/lib/gstreamer-0.10/libgstalsaspdif.so /usr/lib/gstreamer-0.10/libgstbz2.so /usr/lib/gstreamer-0.10/libgstcdxaparse.so /usr/lib/gstreamer-0.10/libgstdtsdec.so /usr/lib/gstreamer-0.10/libgstfilter.so /usr/lib/gstreamer-0.10/libgstfreeze.so /usr/lib/gstreamer-0.10/libgstgsm.so /usr/lib/gstreamer-0.10/libgsth264parse.so /usr/lib/gstreamer-0.10/libgstmms.so /usr/lib/gstreamer-0.10/libgstmodplug.so /usr/lib/gstreamer-0.10/libgstmusepack.so /usr/lib/gstreamer-0.10/libgstqtdemux.so /usr/lib/gstreamer-0.10/libgsttrm.so /usr/lib/gstreamer-0.10/libgstspeed.so /usr/lib/gstreamer-0.10/libgstspectrum.so /usr/lib/gstreamer-0.10/libgstswfdec.so /usr/lib/gstreamer-0.10/libgsttta.so /usr/lib/gstreamer-0.10/libgstvideo4linux2.so /usr/lib/gstreamer-0.10/libgstwavpack.so /usr/lib/gstreamer-0.10/libgstxingheader.so /usr/lib/gstreamer-0.10/libgstvideocrop.so /usr/lib/gstreamer-0.10/libgstneonhttpsrc.so [EMAIL PROTECTED]:~$ dpkg -L gstreamer0.10-plugins-bad-multiverse /. /usr /usr/share /usr/share/doc /usr/share/doc/gstreamer0.10-plugins-bad-multiverse /usr/share/doc/gstreamer0.10-plugins-bad-multiverse/NEWS.gz /usr/share/doc/gstreamer0.10-plugins-bad-multiverse/AUTHORS /usr/share/doc/gstreamer0.10-plugins-bad-multiverse/README.Debian /usr/share/doc/gstreamer0.10-plugins-bad-multiverse/copyright /usr/share/doc/gstreamer0.10-plugins-bad-multiverse/README.gz /usr/share/doc/gstreamer0.10-plugins-bad-multiverse/changelog.Debian.gz /usr/lib /usr/lib/gstreamer-0.10 /usr/lib/gstreamer-0.10/libgstxvid.so /usr/lib/gstreamer-0.10/libgstfaad.so /usr/lib/gstreamer-0.10/libgstfaac.so [EMAIL PROTECTED]:~$ dpkg -L gstreamer0.10-ffmpeg /. /usr /usr/lib /usr/lib/gstreamer-0.10 /usr/lib/gstreamer-0.10/libgstffmpeg.so /usr/share /usr/share/doc /usr/share/doc/gstreamer0.10-ffmpeg /usr/share/doc/gstreamer0.10-ffmpeg/README /usr/share/doc/gstreamer0.10-ffmpeg/TODO /usr/share/doc/gstreamer0.10-ffmpeg/AUTHORS /usr/share/doc/gstreamer0.10-ffmpeg/README.Debian /usr/share/doc/gstreamer0.10-ffmpeg/copyright /usr/share/doc/gstreamer0.10-ffmpeg/changelog.gz /usr/share/doc/gstreamer0.10-ffmpeg/NEWS.gz /usr/share/doc/gstreamer0.10-ffmpeg/changelog.Debian.gz [EMAIL PROTECTED]:~$ I can tell you that my Ubuntu Edgy installation is a new from zero installation and not an upgrade from Dapper (perhaps Edgy has some problems with GStreamer?) -- Edgy: no audio for mp4 files https://launchpad.net/bugs/71689 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
